The Evancho sisters are ready to fight against Trump's transgender military ban

The Evancho sisters, Jackie and Juliet, are ready to fight against President Trump's recent ban on transgender people serving in the military.

Jackie is the 17-year old singer who performed at Trump's inauguration. She told PEOPLE, "It was another one of those moments where I was like, ah, that's a disappointment."

RELATED: Jackie Evancho through the years

30PHOTOS

Jackie Evancho through the years

See Gallery

Jackie Evancho through the years

AMERICA'S GOT TALENT -- Episode 521

Pictured: Jackie Evancho

(Photo by Bret Hartman/NBC/NBCU Photo Bank via Getty Images)

AMERICA'S GOT TALENT -- Episode 532 Live Season 5 Finale

Pictured: (l-r) Future Funk, Jackie Evancho

(Photo by: Brett Hartman/NBC/NBCU Photo Bank)

AMERICA'S GOT TALENT -- Live Season 5 Finale - Episode 53

Pictured: (l-r) Michael Grimm and Jackie Evancho

(Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)

TODAY

Pictured: Jackie Evancho performs on NBC News' 'Today' show

(Photo by Peter Kramer/NBC/NBCU Photo Bank via Getty Images)

THE TONIGHT SHOW WITH JAY LENO -- Episode 3900

Pictured: (l-r) America's Got Talent runner up Jackie Evancho during an interview with host Jay Leno on September 23, 2010

(Photo by: Paul Drinkwater/NBC/NBCU Photo Bank)

WIZARDS OF WAVERLY PLACE - 'Back to Max'

'America's Got Talent' runner-up Jackie Evancho sings at Tribeca Prep's 'Spirit of America Play,' giving Harper a run for her money as she takes the stage for the first time.

(Photo by Eric McCandless/Disney Channel via Getty Images)

THE VIEW - (11.15.10)

The co-hosts welcomed ten year old classical crossover soprano Jackie Evancho who performed on 'The View'.

(Photo by Lou Rocco/ABC via Getty Images)

Muhammad Ali and Jackie Evancho attend an intimate evening with David Foster and Friends in support of organ donor awareness at a private home on November 19, 2010 in Toronto, Canada.

(Photo by George Pimentel/WireImage)

US President Barack Obama stands alongside Santa Claus and 10-year-old singer Jackie Evancho from 'America's Got Talent' at the conclusion during the National Christmas Tree Lighting ceremony on the Ellipse near the White House in Washington, DC, December 9, 2010.

(SAUL LOEB/AFP/Getty Images)

THE TONIGHT SHOW WITH JAY LENO -- Episode 3952

Pictured: Musical guest Jackie Evancho performs on December 15, 2010

(Photo by Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)

Jackie Evancho, Patti LaBelle and Josh Groban perform during Surprise Oprah! A Farewell Spectacular at the United Center on May 17, 2011 in Chicago, Illinois.

(Photo by Daniel Boczarski/Getty Images)

Diane Sawyer, Jackie Evancho, Tom Hanks and Jay DeMarcus attend the Surprise Oprah! A Farewell Spectacular at the United Center on May 17, 2011 in Chicago, Illinois.

(Photo by Barry Brecheisen/WireImage)

Young singing sensation Jackie Evancho performed on 'The View,' 12/6/11.

Classical crossover star Jackie Evancho performs at A Capitol Fourth concert at the U.S. Capitol, West Lawn, on July 4, 2016 in Washington, DC.

(Photo by Paul Morigi/Getty Images for Capital Concerts)

Singer Jackie Evancho performs during Project Sunshine's 13th annual benefit celebration on May 05, 2016 in New York, New York.

(Photo by Noam Galai/Getty Images for Project Sunshine)

Up Next

See Gallery

Discover More Like This

HIDE CAPTION

SHOW CAPTION

of

SEE ALL

BACK TO SLIDE

Her sister Juliet came out as a transgender woman in 2015, and she said, "Transgender people are people and we can fight just as hard as anyone else in the military, and the expenses aren't that bad."

The president's proposal was announced this past July, reversing Barack Obama's policy that gave transgender people rights to openly serve in the military.

In a series of tweets explaining his decision, Trump said the following:

"Our military must be focused on decisive and overwhelming victory and cannot be burdened with the tremendous medical costs and disruption that transgender in the military would entail."

RELATED: Senators react to transgender military ban

10PHOTOS

Senators react to ban on transgender people in the military

See Gallery

Senators react to ban on transgender people in the military

"We should all be guided by the principle that any American who wants to serve our country and is able to meet the standards should have the opportunity to do so — and should be treated as the patriots they are," McCain said.

(Photo credit BRENDAN SMIALOWSKI/AFP/Getty Images)

Democratic House Minority Leader Nancy Pelosi noted in a statement that the date of Trump's announcement coincided with the date President Harry Truman desegregated the military in 1948.

"Sixty-nine years later, President Trump has chosen this day to unleash a vile and hateful agenda that will blindside thousands of patriotic Americans already serving with honor and bravery," Pelosi said. "This disgusting ban will weaken our military and the nation it defends."

(Photo by Joe Raedle/Getty Images)

Republican Sen. Richard Shelby of Alabama was first told of Trump's announcement during a CNN interview, responding that he wanted to read the policy's wording but was sure the Senate will hold hearings on the matter. "You ought to treat everybody fairly and you ought to give everybody a chance to serve," he said.

(Photo by Zach Gibson/Bloomberg via Getty Images)

Democratic Sen. Tammy Duckworth of Illinois, an Iraq War veteran who lost her legs in combat, called the ban "discriminatory and counterproductive to our national security."

(Photo by Zach Gibson/Bloomberg via Getty Images)

"When my Black Hawk helicopter was shot down in Iraq, I didn't care if the American troops risking their lives to help save me were gay, straight, transgender or anything else. All that mattered was they didn't leave me behind," Duckworth said in a statement. "If you are willing to risk your life for our country and you can do the job, you should be able to serve — no matter your gender identity, sexual orientation, or race."

(Photo by Mark Wilson/Getty Images)

When Republican Sen. Orrin Hatch of Utah was asked whether he stood with the state's transgender community, Hatch responded "Yes" on Twitter, then released a longer statement saying "I don't think we should be discriminating against anyone."

Democratic Sen. Sherrod Brown said in a statement the military "should not turn away anyone who is willing and able to serve this country and help keep Americans safe."